diff options
Diffstat (limited to 'xrdp/xrdp_sec.c')
| -rw-r--r-- | xrdp/xrdp_sec.c | 587 |
1 files changed, 0 insertions, 587 deletions
diff --git a/xrdp/xrdp_sec.c b/xrdp/xrdp_sec.c deleted file mode 100644 index f1982f5e..00000000 --- a/xrdp/xrdp_sec.c +++ /dev/null @@ -1,587 +0,0 @@ -/* - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - xrdp: A Remote Desktop Protocol server. - Copyright (C) Jay Sorg 2004-2005 - - secure layer - -*/ - -#include "xrdp.h" - -char pad_54[40] = -{ 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, - 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, - 54, 54, 54, 54, 54, 54, 54, 54 }; - -char pad_92[48] = -{ 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, - 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, - 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92, 92 }; - -char pub_exp[4] = { 0x01, 0x00, 0x01, 0x00 }; - -char pub_mod[64] = -{ 0x67, 0xab, 0x0e, 0x6a, 0x9f, 0xd6, 0x2b, 0xa3, - 0x32, 0x2f, 0x41, 0xd1, 0xce, 0xee, 0x61, 0xc3, - 0x76, 0x0b, 0x26, 0x11, 0x70, 0x48, 0x8a, 0x8d, - 0x23, 0x81, 0x95, 0xa0, 0x39, 0xf7, 0x5b, 0xaa, - 0x3e, 0xf1, 0xed, 0xb8, 0xc4, 0xee, 0xce, 0x5f, - 0x6a, 0xf5, 0x43, 0xce, 0x5f, 0x60, 0xca, 0x6c, - 0x06, 0x75, 0xae, 0xc0, 0xd6, 0xa4, 0x0c, 0x92, - 0xa4, 0xc6, 0x75, 0xea, 0x64, 0xb2, 0x50, 0x5b }; - -char pub_sig[64] = -{ 0x6a, 0x41, 0xb1, 0x43, 0xcf, 0x47, 0x6f, 0xf1, - 0xe6, 0xcc, 0xa1, 0x72, 0x97, 0xd9, 0xe1, 0x85, - 0x15, 0xb3, 0xc2, 0x39, 0xa0, 0xa6, 0x26, 0x1a, - 0xb6, 0x49, 0x01, 0xfa, 0xa6, 0xda, 0x60, 0xd7, - 0x45, 0xf7, 0x2c, 0xee, 0xe4, 0x8e, 0x64, 0x2e, - 0x37, 0x49, 0xf0, 0x4c, 0x94, 0x6f, 0x08, 0xf5, - 0x63, 0x4c, 0x56, 0x29, 0x55, 0x5a, 0x63, 0x41, - 0x2c, 0x20, 0x65, 0x95, 0x99, 0xb1, 0x15, 0x7c }; - -char pri_exp[64] = -{ 0x41, 0x93, 0x05, 0xB1, 0xF4, 0x38, 0xFC, 0x47, - 0x88, 0xC4, 0x7F, 0x83, 0x8C, 0xEC, 0x90, 0xDA, - 0x0C, 0x8A, 0xB5, 0xAE, 0x61, 0x32, 0x72, 0xF5, - 0x2B, 0xD1, 0x7B, 0x5F, 0x44, 0xC0, 0x7C, 0xBD, - 0x8A, 0x35, 0xFA, 0xAE, 0x30, 0xF6, 0xC4, 0x6B, - 0x55, 0xA7, 0x65, 0xEF, 0xF4, 0xB2, 0xAB, 0x18, - 0x4E, 0xAA, 0xE6, 0xDC, 0x71, 0x17, 0x3B, 0x4C, - 0xC2, 0x15, 0x4C, 0xF7, 0x81, 0xBB, 0xF0, 0x03 }; - -char lic1[322] = -{ 0x80, 0x00, 0x3e, 0x01, 0x01, 0x02, 0x3e, 0x01, - 0x7b, 0x3c, 0x31, 0xa6, 0xae, 0xe8, 0x74, 0xf6, - 0xb4, 0xa5, 0x03, 0x90, 0xe7, 0xc2, 0xc7, 0x39, - 0xba, 0x53, 0x1c, 0x30, 0x54, 0x6e, 0x90, 0x05, - 0xd0, 0x05, 0xce, 0x44, 0x18, 0x91, 0x83, 0x81, - 0x00, 0x00, 0x04, 0x00, 0x2c, 0x00, 0x00, 0x00, - 0x4d, 0x00, 0x69, 0x00, 0x63, 0x00, 0x72, 0x00, - 0x6f, 0x00, 0x73, 0x00, 0x6f, 0x00, 0x66, 0x00, - 0x74, 0x00, 0x20, 0x00, 0x43, 0x00, 0x6f, 0x00, - 0x72, 0x00, 0x70, 0x00, 0x6f, 0x00, 0x72, 0x00, - 0x61, 0x00, 0x74, 0x00, 0x69, 0x00, 0x6f, 0x00, - 0x6e, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, - 0x32, 0x00, 0x33, 0x00, 0x36, 0x00, 0x00, 0x00, - 0x0d, 0x00, 0x04, 0x00, 0x01, 0x00, 0x00, 0x00, - 0x03, 0x00, 0xb8, 0x00, 0x01, 0x00, 0x00, 0x00, - 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, - 0x06, 0x00, 0x5c, 0x00, 0x52, 0x53, 0x41, 0x31, - 0x48, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, - 0x3f, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, - 0x01, 0xc7, 0xc9, 0xf7, 0x8e, 0x5a, 0x38, 0xe4, - 0x29, 0xc3, 0x00, 0x95, 0x2d, 0xdd, 0x4c, 0x3e, - 0x50, 0x45, 0x0b, 0x0d, 0x9e, 0x2a, 0x5d, 0x18, - 0x63, 0x64, 0xc4, 0x2c, 0xf7, 0x8f, 0x29, 0xd5, - 0x3f, 0xc5, 0x35, 0x22, 0x34, 0xff, 0xad, 0x3a, - 0xe6, 0xe3, 0x95, 0x06, 0xae, 0x55, 0x82, 0xe3, - 0xc8, 0xc7, 0xb4, 0xa8, 0x47, 0xc8, 0x50, 0x71, - 0x74, 0x29, 0x53, 0x89, 0x6d, 0x9c, 0xed, 0x70, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x08, 0x00, 0x48, 0x00, 0xa8, 0xf4, 0x31, 0xb9, - 0xab, 0x4b, 0xe6, 0xb4, 0xf4, 0x39, 0x89, 0xd6, - 0xb1, 0xda, 0xf6, 0x1e, 0xec, 0xb1, 0xf0, 0x54, - 0x3b, 0x5e, 0x3e, 0x6a, 0x71, 0xb4, 0xf7, 0x75, - 0xc8, 0x16, 0x2f, 0x24, 0x00, 0xde, 0xe9, 0x82, - 0x99, 0x5f, 0x33, 0x0b, 0xa9, 0xa6, 0x94, 0xaf, - 0xcb, 0x11, 0xc3, 0xf2, 0xdb, 0x09, 0x42, 0x68, - 0x29, 0x56, 0x58, 0x01, 0x56, 0xdb, 0x59, 0x03, - 0x69, 0xdb, 0x7d, 0x37, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, - 0x0e, 0x00, 0x0e, 0x00, 0x6d, 0x69, 0x63, 0x72, - 0x6f, 0x73, 0x6f, 0x66, 0x74, 0x2e, 0x63, 0x6f, - 0x6d, 0x00 }; - -char lic2[20] = -{ 0x80, 0x00, 0x10, 0x00, 0xff, 0x02, 0x10, 0x00, - 0x07, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, - 0x28, 0x14, 0x00, 0x00 }; - -/*****************************************************************************/ -struct xrdp_sec* xrdp_sec_create(struct xrdp_rdp* owner, int sck) -{ - struct xrdp_sec* self; - - self = (struct xrdp_sec*)g_malloc(sizeof(struct xrdp_sec), 1); - self->rdp_layer = owner; - self->rc4_key_size = 1; - self->decrypt_rc4_info = g_rc4_info_create(); - self->encrypt_rc4_info = g_rc4_info_create(); - g_random(self->server_random, 32); - self->mcs_layer = xrdp_mcs_create(self, sck, &self->client_mcs_data, - &self->server_mcs_data); - return self; -} - -/*****************************************************************************/ -void xrdp_sec_delete(struct xrdp_sec* self) -{ - if (self == 0) - { - return; - } - xrdp_mcs_delete(self->mcs_layer); - g_rc4_info_delete(self->decrypt_rc4_info); - g_rc4_info_delete(self->encrypt_rc4_info); - g_free(self->client_mcs_data.data); - g_free(self->server_mcs_data.data); - g_free(self); -} - -/*****************************************************************************/ -/* returns error */ -int xrdp_sec_init(struct xrdp_sec* self, struct stream* s) -{ - if (xrdp_mcs_init(self->mcs_layer, s) != 0) - { - return 1; - } - s_push_layer(s, sec_hdr, 4); - return 0; -} - -/*****************************************************************************/ -/* Reduce key entropy from 64 to 40 bits */ -void xrdp_sec_make_40bit(char* key) -{ - key[0] = 0xd1; - key[1] = 0x26; - key[2] = 0x9e; -} - -/*****************************************************************************/ -/* returns error */ -/* update an encryption key */ -int xrdp_sec_update(char* key, char* update_key, int key_len) -{ - char shasig[20]; - void* sha1_info; - void* md5_info; - void* rc4_info; - - sha1_info = g_sha1_info_create(); - md5_info = g_md5_info_create(); - rc4_info = g_rc4_info_create(); - g_sha1_clear(sha1_info); - g_sha1_transform(sha1_info, update_key, key_len); - g_sha1_transform(sha1_info, pad_54, 40); - g_sha1_transform(sha1_info, key, key_len); - g_sha1_complete(sha1_info, shasig); - g_md5_clear(md5_info); - g_md5_transform(md5_info, update_key, key_len); - g_md5_transform(md5_info, pad_92, 48); - g_md5_transform(md5_info, shasig, 20); - g_md5_complete(md5_info, key); - g_rc4_set_key(rc4_info, key, key_len); - g_rc4_crypt(rc4_info, key, key_len); - if (key_len == 8) - { - xrdp_sec_make_40bit(key); - } - g_sha1_info_delete(sha1_info); - g_md5_info_delete(md5_info); - g_rc4_info_delete(rc4_info); - return 0; -} - -/*****************************************************************************/ -void xrdp_sec_decrypt(struct xrdp_sec* self, char* data, int len) -{ - if (self->decrypt_use_count == 4096) - { - xrdp_sec_update(self->decrypt_key, self->decrypt_update_key, - self->rc4_key_len); - g_rc4_set_key(self->decrypt_rc4_info, self->decrypt_key, - self->rc4_key_len); - self->decrypt_use_count = 0; - } - g_rc4_crypt(self->decrypt_rc4_info, data, len); - self->decrypt_use_count++; -} - -/*****************************************************************************/ -/* returns error */ -int xrdp_sec_process_logon_info(struct xrdp_sec* self, struct stream* s) -{ - int flags; - int len_domain; - int len_user; - int len_password; - int len_program; - int len_directory; - - in_uint8s(s, 4); - in_uint32_le(s, flags); - DEBUG(("in xrdp_sec_process_logon_info flags $%x\n\r", flags)); - /* this is the first test that the decrypt is working */ - if ((flags & RDP_LOGON_NORMAL) != RDP_LOGON_NORMAL) /* 0x33 */ - { /* must be or error */ - return 1; - } - if (flags & RDP_LOGON_AUTO) - { - } - if (flags & RDP_COMPRESSION) - { - } - in_uint16_le(s, len_domain); - in_uint16_le(s, len_user); - in_uint16_le(s, len_password); - in_uint16_le(s, len_program); - in_uint16_le(s, len_directory); - in_uint8s(s, len_domain + 2); - in_uint8s(s, len_user + 2); - in_uint8s(s, len_password + 2); - in_uint8s(s, len_program + 2); - in_uint8s(s, len_directory + 2); - return 0; -} - -/*****************************************************************************/ -/* returns error */ -int xrdp_sec_send_lic_initial(struct xrdp_sec* self) -{ - struct stream* s; - - make_stream(s); - init_stream(s, 8192); - if (xrdp_mcs_init(self->mcs_layer, s) != 0) - { - free_stream(s); - return 1; - } - out_uint8a(s, lic1, 322); - s_mark_end(s); - if (xrdp_mcs_send(self->mcs_layer, s) != 0) - { - free_stream(s); - return 1; - } - free_stream(s); - return 0; -} - -/*****************************************************************************/ -/* returns error */ -int xrdp_sec_send_lic_response(struct xrdp_sec* self) -{ - struct stream* s; - - make_stream(s); - init_stream(s, 8192); - if (xrdp_mcs_init(self->mcs_layer, s) != 0) - { - free_stream(s); - return 1; - } - out_uint8a(s, lic2, 20); - s_mark_end(s); - if (xrdp_mcs_send(self->mcs_layer, s) != 0) - { - free_stream(s); - return 1; - } - free_stream(s); - return 0; -} - -/*****************************************************************************/ -void xrdp_sec_reverse(char* p, int len) -{ - int i; - int j; - char temp; - - i = 0; - j = len - 1; - while (i < j) - { - temp = p[i]; - p[i] = p[j]; - p[j] = temp; - i++; - j--; - } -} - -/*****************************************************************************/ -void xrdp_sec_rsa_op(char* out, char* in, char* mod, char* exp) -{ - char lexp[64]; - char lmod[64]; - char lin[64]; - char lout[64]; - int len; - - g_memcpy(lexp, exp, 64); - g_memcpy(lmod, mod, 64); - g_memcpy(lin, in, 64); - xrdp_sec_reverse(lexp, 64); - xrdp_sec_reverse(lmod, 64); - xrdp_sec_reverse(lin, 64); - g_memset(lout, 0, 64); - len = g_mod_exp(lout, lin, lmod, lexp); - xrdp_sec_reverse(lout, len); - g_memcpy(out, lout, 64); -} - -/*****************************************************************************/ -void xrdp_sec_hash_48(char* out, char* in, char* salt1, char* salt2, int salt) -{ - int i; - void* sha1_info; - void* md5_info; - char pad[4]; - char sha1_sig[20]; - char md5_sig[16]; - - sha1_info = g_sha1_info_create(); - md5_info = g_md5_info_create(); - for (i = 0; i < 3; i++) - { - g_memset(pad, salt + i, 4); - g_sha1_clear(sha1_info); - g_sha1_transform(sha1_info, pad, i + 1); - g_sha1_transform(sha1_info, in, 48); - g_sha1_transform(sha1_info, salt1, 32); - g_sha1_transform(sha1_info, salt2, 32); - g_sha1_complete(sha1_info, sha1_sig); - g_md5_clear(md5_info); - g_md5_transform(md5_info, in, 48); - g_md5_transform(md5_info, sha1_sig, 20); - g_md5_complete(md5_info, md5_sig); - g_memcpy(out + i * 16, md5_sig, 16); - } - g_sha1_info_delete(sha1_info); - g_md5_info_delete(md5_info); -} - -/*****************************************************************************/ -void xrdp_sec_hash_16(char* out, char* in, char* salt1, char* salt2) -{ - void* md5_info; - - md5_info = g_md5_info_create(); - g_md5_clear(md5_info); - g_md5_transform(md5_info, in, 16); - g_md5_transform(md5_info, salt1, 32); - g_md5_transform(md5_info, salt2, 32); - g_md5_complete(md5_info, out); - g_md5_info_delete(md5_info); -} - -/*****************************************************************************/ -void xrdp_sec_establish_keys(struct xrdp_sec* self) -{ - char session_key[48]; - char temp_hash[48]; - char input[48]; - - g_memcpy(input, self->client_random, 24); - g_memcpy(input + 24, self->server_random, 24); - xrdp_sec_hash_48(temp_hash, input, self->client_random, - self->server_random, 65); - xrdp_sec_hash_48(session_key, temp_hash, self->client_random, - self->server_random, 88); - g_memcpy(self->sign_key, session_key, 16); - xrdp_sec_hash_16(self->encrypt_key, session_key + 16, self->client_random, - self->server_random); - xrdp_sec_hash_16(self->decrypt_key, session_key + 32, self->client_random, - self->server_random); - if (self->rc4_key_size == 1) - { - xrdp_sec_make_40bit(self->sign_key); - xrdp_sec_make_40bit(self->encrypt_key); - xrdp_sec_make_40bit(self->decrypt_key); - self->rc4_key_len = 8; - } - else - { - self->rc4_key_len = 16; - } - g_memcpy(self->decrypt_update_key, self->decrypt_key, 16); - g_memcpy(self->encrypt_update_key, self->encrypt_key, 16); - g_rc4_set_key(self->decrypt_rc4_info, self->decrypt_key, self->rc4_key_len); - g_rc4_set_key(self->encrypt_rc4_info, self->encrypt_key, self->rc4_key_len); -} - -/*****************************************************************************/ -/* returns error */ -int xrdp_sec_recv(struct xrdp_sec* self, struct stream* s, int* chan) -{ - int flags; - int len; - - DEBUG((" in xrdp_sec_recv\n\r")); - if (xrdp_mcs_recv(self->mcs_layer, s, chan) != 0) - { - DEBUG((" out xrdp_sec_recv error\n\r")); - return 1; - } - in_uint32_le(s, flags); - DEBUG((" in xrdp_sec_recv flags $%x\n\r", flags)); - if (flags & SEC_ENCRYPT) /* 0x08 */ - { - in_uint8s(s, 8); /* signature */ - xrdp_sec_decrypt(self, s->p, s->end - s->p); - } - if (flags & SEC_CLIENT_RANDOM) /* 0x01 */ - { - in_uint32_le(s, len); - in_uint8a(s, self->client_crypt_random, 64); - xrdp_sec_rsa_op(self->client_random, self->client_crypt_random, - pub_mod, pri_exp); - xrdp_sec_establish_keys(self); - *chan = 1; /* just set a non existing channel and exit */ - return 0; - } - if (flags & SEC_LOGON_INFO) /* 0x40 */ - { - if (xrdp_sec_process_logon_info(self, s) != 0) - { - return 1; - } - if (xrdp_sec_send_lic_initial(self) != 0) - { - return 1; - } - *chan = 1; /* just set a non existing channel and exit */ - return 0; - } - if (flags & SEC_LICENCE_NEG) /* 0x80 */ - { - if (xrdp_sec_send_lic_response(self) != 0) - { - return 1; - } - return -1; /* special error that means send demand active */ - } - DEBUG((" out xrdp_sec_recv error\n\r")); - return 0; -} - -/*****************************************************************************/ -/* returns error */ -/* TODO needs outgoing encryption */ -int xrdp_sec_send(struct xrdp_sec* self, struct stream* s, int flags) -{ - DEBUG((" in xrdp_sec_send\n\r")); - s_pop_layer(s, sec_hdr); - out_uint32_le(s, flags); - if (xrdp_mcs_send(self->mcs_layer, s) != 0) - { - return 1; - } - DEBUG((" out xrdp_sec_send\n\r")); - return 0; -} - -/*****************************************************************************/ -/* prepare server mcs data to send in mcs layer */ -void xrdp_sec_out_mcs_data(struct xrdp_sec* self) -{ - struct stream* p; - - p = &self->server_mcs_data; - init_stream(p, 512); - out_uint16_be(p, 5); - out_uint16_be(p, 0x14); - out_uint8(p, 0x7c); - out_uint16_be(p, 1); - out_uint8(p, 0x2a); - out_uint8(p, 0x14); - out_uint8(p, 0x76); - out_uint8(p, 0x0a); - out_uint8(p, 1); - out_uint8(p, 1); - out_uint8(p, 0); - out_uint16_le(p, 0xc001); - out_uint8(p, 0); - out_uint8(p, 0x4d); /* M */ - out_uint8(p, 0x63); /* c */ - out_uint8(p, 0x44); /* D */ - out_uint8(p, 0x6e); /* n */ - out_uint16_be(p, 0x80fc); - out_uint16_le(p, SEC_TAG_SRV_INFO); - out_uint16_le(p, 8); /* len */ - out_uint8(p, 4); /* 4 = rdp5 1 = rdp4 */ - out_uint8(p, 0); - out_uint8(p, 8); - out_uint8(p, 0); - out_uint16_le(p, SEC_TAG_SRV_CHANNELS); - out_uint16_le(p, 8); /* len */ - out_uint8(p, 0xeb); - out_uint8(p, 3); - out_uint8(p, 0); - out_uint8(p, 0); - out_uint16_le(p, SEC_TAG_SRV_CRYPT); - out_uint16_le(p, 0x00ec); /* len is 236 */ - out_uint32_le(p, 1); /* key len 1 = 40 bit 2 = 128 bit */ - out_uint32_le(p, 1); /* crypt level 1 = low 2 = medium 3 = high */ - out_uint32_le(p, 32); /* 32 bytes random len */ - out_uint32_le(p, 0xb8); /* 184 bytes rsa info(certificate) len */ - out_uint8a(p, self->server_random, 32); - /* here to end is certificate */ - /* HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ */ - /* TermService\Parameters\Certificate */ - out_uint32_le(p, 1); - out_uint32_le(p, 1); - out_uint32_le(p, 1); - out_uint16_le(p, SEC_TAG_PUBKEY); - out_uint16_le(p, 0x005c); /* 92 bytes length of SEC_TAG_PUBKEY */ - out_uint32_le(p, SEC_RSA_MAGIC); - out_uint32_le(p, 0x48); /* 72 bytes modulus len */ - out_uint32_be(p, 0x00020000); - out_uint32_be(p, 0x3f000000); - out_uint8a(p, pub_exp, 4); /* pub exp */ - out_uint8a(p, pub_mod, 64); /* pub mod */ - out_uint8s(p, 8); /* pad */ - out_uint16_le(p, SEC_TAG_KEYSIG); - out_uint16_le(p, 72); /* len */ - out_uint8a(p, pub_sig, 64); /* pub sig */ - out_uint8s(p, 8); /* pad */ - /* end certificate */ - s_mark_end(p); -} - -/*****************************************************************************/ -int xrdp_sec_incoming(struct xrdp_sec* self) -{ - DEBUG(("in xrdp_sec_incoming\n\r")); - xrdp_sec_out_mcs_data(self); - if (xrdp_mcs_incoming(self->mcs_layer) != 0) - { - return 1; - } -#ifdef XRDP_DEBUG - g_printf("client mcs data received\n\r"); - g_hexdump(self->client_mcs_data.data, - self->client_mcs_data.end - self->client_mcs_data.data); - g_printf("server mcs data sent\n\r"); - g_hexdump(self->server_mcs_data.data, - self->server_mcs_data.end - self->server_mcs_data.data); -#endif - DEBUG(("out xrdp_sec_incoming\n\r")); - return 0; -} - -/*****************************************************************************/ -int xrdp_sec_disconnect(struct xrdp_sec* self) -{ - return xrdp_mcs_disconnect(self->mcs_layer); -} |
